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Optical trapping potential

Posted 13.08.2014, 01:28 GMT-4 RF & Microwave Engineering Version 4.4 1 Reply

Soonwoo Hong
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hi, I am calculating trapping potential by optical trapping integral. In my model, the focused light is incident into sharp gold substrate, thus the huge enhanced electric field causes the optical trapping something. I already get the optical trapping force, however, I cannot solve the trapping potential by the optical trapping force.

In detail,

As I searched in searching engine like google, the optical trapping potential is calculated by the integral equation as attached below, however, I cannot apply the equation in COMSOL. What can I do? Somebody helps me, please.



as I mentioned before, I already have the force (Fx, Fy, Fz, respectively)

Thanks,

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1 Reply Last Post 18.12.2014, 12:51 GMT-5
COMSOL Moderator

Hello Soonwoo Hong

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Souvik Ghosh
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Posted: 10 years ago 18.12.2014, 12:51 GMT-5
Hi,

I have not done it as I am yet to calculate the trapping force. What if you do a line integration from a very far point(let from the boundary of PML) to the desired point where you want to calculate potential. I am just guessing. Let me know if its working.

Btw wil you please tell me how to calculate the force? Thanks!!
Hi, I have not done it as I am yet to calculate the trapping force. What if you do a line integration from a very far point(let from the boundary of PML) to the desired point where you want to calculate potential. I am just guessing. Let me know if its working. Btw wil you please tell me how to calculate the force? Thanks!!

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